Data transmission method and device

A data transmission method and number technology, applied in the field of data transmission methods and devices, can solve the problems of low utilization rate of bandwidth resources, waste, and influence of bandwidth utilization rate, etc.

Active Publication Date: 2018-01-09
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the service rate is relatively small, or a little more than the integer multiple of the time slot, for example, in a 100G OTN frame, the bandwidth of a time slot is 1.25G, and it is obviously unreasonable to directly load the service with a rate of 100M into the time slot. The service with a rate of 1.26G will occupy two time slots, one time slot is fully utilized, and the other time slot is almost wasted, and the utilization rate of bandwidth resources is low.
In GMP mapping, the use of rigid bandwidth division causes the bandwidth utilization rate to be greatly affected by the customer service rate

Method used

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Examples

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no. 1 example

[0085] see figure 1 , the first embodiment of the present invention provides a data transmission method, which is applied to the sending end of the optical transport network OTN, including:

[0086] Step 101, convert the first frame structure into an intermediate frame structure, the intermediate frame structure is an irregular ODU frame, and at least part of the bytes in each clock cycle of the irregular ODU frame are valid bytes.

[0087] Specifically, the first frame structure can be customer service data or low-order ODU frames (low-order ODU frames and high-order ODU frames are relative concepts, and the rate of low-order ODU frames is lower than the rate of high-order ODU frames), OTN has nothing to do with customers , customer service data can be ODU frames; OTN services are mainly the mapping from customer service data to low-order ODU frames or the mapping from low-order ODU frames to high-order ODU frames; in the embodiments of the present invention, a method based o...

no. 2 example

[0203] see Figure 8 , the second embodiment of the present invention provides a data transmission device, which is applied to the sending end of the optical transport network OTN, including:

[0204] The conversion module 801 is configured to convert the first frame structure into an intermediate frame structure, the intermediate frame structure is an irregular ODU frame, and at least part of bytes in each clock cycle of the irregular ODU frame are valid bytes.

[0205] Specifically, the first frame structure can be customer service data or low-order ODU frames (low-order ODU frames and high-order ODU frames are relative concepts, and the rate of low-order ODU frames is lower than the rate of high-order ODU frames), OTN has nothing to do with customers , customer service data can be ODU frames; OTN services are mainly the mapping from customer service data to low-order ODU frames or the mapping from low-order ODU frames to high-order ODU frames; in the embodiments of the pres...

no. 3 example

[0234] see Figure 9 , the third embodiment of the present invention provides a data transmission method, which is applied to the receiving end of the optical transport network OTN, including:

[0235] Step 901, converting the second optical channel data unit ODU frame from the sending end into an intermediate frame structure; the intermediate frame structure is an irregular ODU frame, and the bytes of the irregular ODU frame in each clock cycle are at least partially valid bytes; The second ODU frame is a regular ODU frame, and the bytes of the regular ODU frame are valid bytes or invalid bytes in each clock cycle; wherein, the rate of the valid bytes of the intermediate frame structure is equal to the rate of the second ODU frame.

[0236] Among them, the second ODU frame is a high-order ODU frame (the low-order ODU frame and the high-order ODU frame are relative concepts, and the rate of the low-order ODU frame is lower than the rate of the high-order ODU frame); at the rec...

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Abstract

The invention provides a data transmission method and device, and the method is used for a transmitting end of an OTN (optical transmission network). The method comprises the steps: converting a firstframe structure into a central frame structure, wherein the central frame structure is an irregular ODU frame, and at least a part of bytes of the irregular ODU frame in each clock period are effective bytes; converting the central frame structure into a second ODU frame, and transmitting the second ODU frame into a receiving end, wherein the rate of the second ODU frame is higher than the rate of the first frame structure. The second ODU frame is a regular ODU frame, and the bytes of the regular ODU frame in each clock period are effective bytes or ineffective bytes. The rate of the effective bytes of the central frame structure is equal to the rate of the second ODU frame. The method employs FMP mapping, and solves a problem that a GMP mapping mode has defects in the OTN business.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a data transmission method and device. Background technique [0002] In the Optical Transport Network (OTN, Optical Transport Network), the client signal is loaded into the OTN frame or the low-rate ODU frame is mapped to the high-rate Optical Channel Data Unit (ODU) frame. Currently, the commonly used method is Bit Synchronous Mapping (BMP, Bit-synchronous Mapping Procedure), asynchronous mapping (AMP, Asynchronous Mapping Procedure) and general mapping procedure (GMP, Generic Mapping Procedure); among the three mapping methods, GMP is the most widely used. [0003] The GMP divides an optical channel payload unit (OPU, optical channel payload unit) of an OTN frame into subspaces of the same size, and these subspaces are called time slots. The size of the time slot is related to the rate of the OTN frame. In the 100G OTN frame, the time slot size is 1.25G, that is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/00H04Q11/04
CPCH04J3/06
Inventor 鄢媛媛张源斌刘会田刘传珠
Owner ZTE CORP
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